...内,定义函数int dis(int a,int b)求两数的最大公约数。答:代码文本:include "stdio.h"int dis(int a,int b){//求GCD int r;while(r=a%b)a=b,b=r;return b;} int main(int argc,char *argv[]){//验证主函数 printf("%d %d: %d\n",5,7,dis(5,7));printf("%d %d: %d\n",12,16,dis(12,16));printf("%d %d: %d\n...